Process for removing components from solutions

Abstract

A dispensing device having a container body defining a solution retaining chamber therein, the container having an outlet for dispensing the solution from the chamber and means for removing a component from the solution as the solution is dispensed from the chamber through the container outlet.

What is claimed is: 
     
       1. A method for selectively removing a preservative agent from an opthalmic solution which comprises bringing an opthalmic solution containing a preservative agent into contact with a scavenging means which selectively removes the preservative agent from the opthalmic solution to obtain a preservative agent-free opthalmic solution. 
     
     
       2. A method according to claim 1 wherein said scavenging means is a material having a negative charge and said preservative agent has a positive charge. 
     
     
       3. A method according to claim 1 wherein said scavenging means is a material having a positive charge and said preservative agent has a negative charge. 
     
     
       4. A method according to claim 1 wherein said scavenging means is fumed silica and said preservative agent is a quaternary ammonium compound. 
     
     
       5. A method according to claim 1 wherein said scavenging means is in the form of a porous mass. 
     
     
       6. A method according to claim 5 wherein said porous mass is porous plastic embedded with sulfonated cross-linked styrene divinyl benzene. 
     
     
       7. A method according to claim 1 wherein the opthalmic solution is a wetting solution. 
     
     
       8. A method according to claim 1 wherein the opthalmic solution is a cleaning solution. 
     
     
       9. A method according to claim 1 wherein the opthalmic solution is a soaking solution.